Micrometer adjusting mechanism for microscopes and other devices.



P. H. F. KAUFMANN.

MIGROMETEB ADJUSTING MECHANISM FOR MIGROSGOPES AND OTHER DEVICES.

APPLIOATION FILED NOV. 19, 1908. RENEWED JAN. 2. 1914.

, 1,110,266 Patented Sept. 8, 1914.

Fig.1. I mvv 5 Hg. 2.

g myax lnventor.

THE NORRIS PETERS CO. PHOTO-LITHQ. WASHINGTON. 0. C4

the speed reducing member of the microm-i 3O microscope.

UNITED STATES? PATENT OFFICE.

PAUL n. r. KAUFMANN, or non-rrrronnwnnnn', ivnwfyonn.

MI [CROMETER ADJUSTING MECHANISM FOR MIGROSGOPES AND GTHEE DEVICES Specification of Letters Eatent.

Patented Sept. 8, "1914:.

Application filed November '19, 1908, Serial No. 463,364. Renewed January 2, 1914. Serial No. 810,042.

To all whom it may concern:

Be it known that I, PAUL H. F. KAU MANN, a citizen of the United States, residing at North Tonawanda, in the county of Niagara and State of New York have'invented a certain new and usefullmprove ment in Micrometer Adjusting Mechanism for Microscopes and 0 her Devices, of which the following is a specification.

This invention relates to a micrometer adjusting mechanism for microscopes and other devices.

The object of the invention is to provide a plurality of adjustments of diiiering feed so that a very fine adjustment can be quickly and accurately obtained.

The invention also relates to certain details of the adjusting mechanism which will be hereinafter described reference being had to the accompanying drawings in which Figure 1 is a central vertical" section through a portion of a microscope equipped with the nnproved micrometer ad ustment.-

Fig. 2 is a side view of the improved mi- 'crometer adjustment detached from the Fig; :3 is a detached bottom view of the improved micrometer adjustment. Fig. l is adetached ,plan view oi eter adjustment. Fig. 5 is a detached bottom view of the same. 6 is a detached central section through the revoluble nut of the speed reducing member, the screw threaded sleeve carried thereby being shown in full. Fig. 7 is a detached central section through the screw threaded sleeve of. the speed reducing. memben Fig. 8 is adetached central section through the stationary member of the improved micrometer adjustment. Fig. 9 is a detached side elevation of the stationary sleeve. Fig. 10 is a detached plan view of the stationary sleeve.

In'referringto the drawings for the details of construction like numerals desig- .nate like parts.

"While the adjusting mechanism is shown in the accompanying drawings attached in a vertical position lto .a microscope it is equally adapted to'be attached to the side or other suitable "portion of a microscope or to be connected to other devices requiring a very fine accurate adjustment.

The adjusting mechanism consists of cer: tain'members or elements which are termed anfa djusting member; a supporting or base memberand a speed reducing member.

The ad'ustiii member as constructed in the preferred adaptation illustrated 1 comprises an upper or thumb nut 1, having a knurled fiangeZ toafi orda convenient turn-- ing grip fol-the fingers of theoperator and a stenif 3 which is'screw threa'de'dand has an enlarged head 4 which is screw threaded to screw into the thumb nut l and a top flange 5, which contacts with the upper surface of the thumb nut when the stem is in its centrally dependingposition with respect to the thumb nut. The lower end of the'stem has.

a reduced cone point bearing 6 the purpose of "which will be explained further on;

The form of supporting or base member shown in the drawings is a stationary nut '7 which is screwed firmly to the upper portionofa mounting 8, which carriesthe ob- Jective lens e1. the microscope. The mountmg is ad ustably supportedon a pillar 9 which extends"vertically upward from a microscopehase 10.-j v

The pillar 9 isqhollow and a compression spring 11 is located therein with its upper terminal bearing against an end piece 12 closing' the' top mouth of the opening in the pillar and its lower terminal being. fitted 1 around a slide block 13 which is supported on a transverse pin' 14 which is carried by 35 the mounting and passes through a vertical slot 15 m the p llar. The end p ece 12 has a.

top vertical socket in which a cone pointed pm 16 is located and said pm 16 has a com-- CitlClePlQSSlOIl mats upper end 1n which the coneend 6 of the stem 3 has bearing to threaded both internally and externally and 5 I in turn screws upon the stem of the adjust- 7 ng member. The purpose of the sleeve l9 is to prevent the revolving of either the ad 'justing member or the speed reducing member through the turning of the other mem her, as it constitutes anunrevoluble element "which is directly interposed between the two members and intercepts and prevents the transmission of the turning movement from one member to the other. The sleeve 19 is preferably secured to the stationary nut against rotation by two oppositely disposed sets of screws 20which have tapering points 21 that engage in recesses 22 in a bottom flange 23 on the sleeve.

A suitable scale 2a .with division lines is marked on the thumb nut 1 and the speed reducing member so that the range of adjustment may be accurately determined. This scale takes the place of indicating pointers or hands which necessarily, from their position in proximity to the members, do interfere with the revolving of the members by preventing the grasping of their surface by the fingers of the operator at some point or points around their circumference or by striking against the fingers. With this mechanism both a comparatively coarse adjustment and also a very fine adjustment can be secured. The coarse adjustment is obtained by revolving the adjusting member, the de gree of coarseness of adjustment being determined by the pitch of the thread on the stem oi the adjusting member. The very fine adjustment is secured by turning the speed reducing member which rotates in the stationary member or nut and moves longitudinally in said member in one direction, and at the same time rotates on the stationary sleeve and bodily moves the stationary sleeve and the adjusting member in the same direction as the longitudinal movement of the speed reducing member in the stationary member, but to a less distance. It will thus be seen that the actual range of adjusting movement is the difference in length between the relatively opposite movements of the speed reducing member and the adjusting member so that an exceedingly fine adjustment is obtained. While the speed reducing member and the adjusting member move in opposite directions with respect to each other, the greater lead or movement of the speed reducing member actually carries the adjusting'member with it, so that both members move oppositely with respect to each other and in the same direction with respect to the instrument to which they are attached.

IVhile this adjusting mechanism is principally designed for securing fine focusing adjustment for microscopes, it is also adapted to instruments of precision or other devices requiring means to secure fine adjustments.

I claim 1. In an adjustment device for microscopes and other instruments, an adjusting member, a base member, a speed reducing member intermediate the adjusting member and the base member and carrying a sleeve threaded both internally and externally and having threaded engagement with the base member and a separate revoluble sleeve between the adjusting member and the speed reducing member.

2. In 'an adjustment device for microscopes and other instruments, an adjusting member, a base member, a speed reducing.

member intermediate the adjusting member and the base member and a non-revoluble sleeve interposed between the adjusting member and the speed reducing member and threaded both internally and externally and having separate threaded engagement with the adjusting member and the speed redueing member.

3. In an adjustment device for microscopes and other instruments, a base member, a. speed reducing member having threaded engagement with the base member, an adjusting member and a non-rotatable member interposed between and having threaded engagement with both the speed reducing member and the adjusting member.

4. In an adjustment mechanism for mi-' croscopes and other instruments, a revoluble adjusting member, a revoluble speed reducing member and a non-revoluble member interposed between the revoluble adjusting member and the revoluble speed reducing member.

5. In an adjustment device for microscopes and other instruments, a revoluble member having a stem, a base member, a

speed reducing member intermediate the rev posed between the revoluble member. and r the speed reducing member.

6 In an adjustment mechanism for inicroscopes or other instruments, the combi- .natiouwith a fixed element and a movable element, of variable ad usting mechanism for said movable element having a direct adjusting member and a differential adjusting member concentric with but entirely out of contact with said direct adjusting member, and means connecting said members for the transmission of longitudi nal movement only.

7. In an adjustment mechanism for microscopes and other instruments, a revoluble adjusting member, a revoluble speed reduc ing: member, a support for said members and means interposed between the members for preventing the transmission of rotation from one member to the other.

8. In an adjustment mechanism for microscopes and other instruments, a revoluble adjusting member, a revoluble speed reducing member, a support for said members and means interposed between the members and secured to the support for preventing the transmission of rotation from one member to the other. I

9. In an adjustment mechanism for microscopes and other instruments, a revoluble adjusting member, a revoluble speed reducing member, a support for said members and an unrevoluble element interposed between the members for preventing the trans mission of rotation from one member to the other. i

10. In an adjustment mechanism for microscopes and other instruments, a revoluble adjusting member, a revoluble speed reducing member, a support for said members and an unrevoluble screw threaded sleeve interposed between the members. 1

and an adjustable element, of an adjusting member, a speed reducing member and a screw threaded sleeve fitted on the adjusting member and within the speed reducing member.

13. In an adjustment mechanism for microscopes or other instruments, the combination with a fixed element and a movable element, of variable adjusting mechanism for said movable element having a direct adjusting member and a diiierential adjusting member concentric with but entirely out of contact with said direct adjusting member, and non-rotatable means connecting said adjustingimembers for the transmission of longitudinal movement but not rotary movement from one of said adjusting members to the other adjusting member. PAULFH F. KAUFMANN. Witnesses:

L. M. SANGsTER, GEORGE A. NEUBAUER.

Copies of this patent may he obtained for five cents each, by addressing the Commissioner of Iatents,

Washington, I). G. 

